Question about G30 and firmware 3.2

fcwilt

Hi,

I've been testing my new Duet 3 Mini 5 board with firmware v3.2

Working on Z probe testing - I have this in config.g:

M558 P5 C"!^io0.in" H2 F120 T10000 R0.2 A1 S0.03
G31 P500 X0 Y0 Z5

When executing a G30 the Z stepper starts to move in the a correct direction and when I trigger the Z probe the stepper stops and the Z coordinate is set.

The docs say this about G30:

G30 ; Probe the bed at the current XY position. When the probe is triggered, set the Z coordinate to the probe trigger height.

Now the "probe trigger height" mentioned is the value of the Z parameter in the G31 - correct?

However the Z coordinate is actually being set to the sum of the Z probe trigger height from G31 and the Z probe dive height from M558.

Is that a bug or just how G30 works.

Thanks much.

Frederick

Veti

@fcwilt said in Question about G30 and firmware 3.2:

Is that a bug or just a change in how G30 works.

that is how it works.

then the probe is trigged z is set to 5. then the probe moves out of the way as defined by H

so you end up with z=7

fcwilt

@Veti said in Question about G30 and firmware 3.2:

@fcwilt said in Question about G30 and firmware 3.2:

Is that a bug or just a change in how G30 works.

that is how it works.

then the probe is trigged z is set to 5. then the probe moves out of the way as defined by H

so you end up with z=7

Thanks.

It seems that I just never noticed it before - when I looked at the locations on my printers gcode where G30 was used it was always followed by a Z move.

Frederick